Final answer:
Administer oxygen via nasal cannula is the priority action for a client with chest pain, diaphoresis, and dizziness.
Explanation:
The priority action in this scenario is to administer oxygen via nasal cannula. Oxygen administration is crucial in a client presenting with chest pain, diaphoresis, and dizziness, as it helps improve oxygenation levels and supports vital functions.
Obtaining electrocardiographic monitoring is essential for assessing cardiac activity and identifying any potential heart-related issues, given the symptoms presented by the client.
Calling the healthcare provider and starting an IV line and drawing blood can be important actions to take, but in this case, the immediate priority is administering oxygen via nasal cannula.
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